A leaked service manual of the LG-D821 a.k.a. Nexus 5 reveals most of what there is to know about the device - design, specs and even how to open it.
We already knew the most important features from various leaks, but here is the real deal. The Nexus 5 packs a 4.95" 1080p IPS display and runs on the Snapdragon 800 chipset with a quad-core 2.3GHz Krait 400 CPU, Adreno 330 GPU and 2GB of RAM. It has a 1.3MP front camera, an 8MP OIS camera with a LED flash at the back and a 2300mAh battery underneath the rear cover.

According to the service manual,the Nexus 5 supports GSM, 3G, CDMA and LTE connectivity plus NFC and Bluetooth 4.0. The phone also comes with a Slimport-enabled microUSB and wireless charging support. As it turns out the Nexus 5 will come in 16GB and 32GB flavors, but as was to be expected there is no option for memory expansion.
The last notable specs are the notification LED and the microSIM slot. Android 4.4 KitKat will be in charge of operations, of course.